Agent Skills: foundation-sprint

Evaluate, pressure-test, or sharpen any product, feature, app, startup, or business idea using the Foundation Sprint method from Jake Knapp and John Zeratsky's book Click (How to Make What People Want). Use this whenever the user wants to decide what to build, judge whether an idea is worth pursuing, find product-market fit, nail differentiation, choose between approaches or directions, write or critique a value proposition, or make an existing product better. Trigger on phrases like 'is this a good idea', 'should I build this', 'validate this idea', 'what should I build', 'how do I stand out', 'how do I differentiate', 'will people want this', 'evaluate my idea', 'critique my product', 'how do I improve my product', 'founding hypothesis', 'positioning', or any time someone is starting a project or stuck choosing a direction, even if they never mention the book. Produces a testable Founding Hypothesis, a differentiation 2x2, a Magic Lenses comparison, and a prove-it scorecard.